Then, on
the past June 22, G. L. asked by email to me, for the
largest prime
serial number I could have of my own in any Mexican Bill and
a for a photo of it.

Unexpectedly it happened
that I had one of these in my pocket, and a kind of close to
the largest possible prime
serial number composed of 7 digits for the Mexican bills:
9999991, being the mine
9799903
for a 100 pesos Mexican bill. Here is the photo I sent to
Honaker, Jr.

Q.
Please send the largest prime serial number for a bill
of your own, from your country and a photo of it. No tricks,
OK?...

Just to offer you a guide
to size your bills serial numbers, here are the largest
prime numbers for several quantity of digits: